Question

When a p-n junction diode is forward biased:

• A. The barrier height and the depletion layer width both increase.
• B. The barrier height increases and the depletion layer width decreases.
• C. The barrier height and the depletion layer width both decrease.
• D. The barrier height decreases and the depletion layer width increases.

Hint:

In a forward-biased p-n junction, the applied voltage decreases the potential barrier and narrows the depletion region, allowing current to flow.

Answer 1

The Correct Option is C

When a p-n junction diode is forward biased, the applied voltage reduces the barrier height and narrows the depletion region. This allows current to flow through the diode. Therefore, both the barrier height and the depletion layer width decrease when the diode is forward biased. Thus, the correct answer is (C).